Attachment for milling machines and the like



MarchZO, 1945. N. A. JoHANsoN ATTACHMENTFO MILLING MACHINES `AND THE LIKE 5 sheds-sheet 1 Filed March 18, 1944 March 20, 1945. N. A. JoHANsoN v ATTACHMENT FOR MILLING MACHINES AND THE LIKE Filedv March 18, 1944 5 Sheets-Sheet 2 numim;nilnnninimiHum y INVENToR.

ATTORNEY Marh 20, 1945. -N. A. JoHANsoN 'n 2,372,000`

ATTACHMNT FOR MILLING MACHINES AND THE LIKE Filed March 18, 1944 5 Sheets-Sheet 5 v.2 j -51 l ..54 azz 7/// =rllllllll Z HTTOHNEY March 20, 1945. N. A. JoHANsoN ATTACHMENT FOR MILLING MACHINES AND THE LIKE.y

Filed March 1s, 1944 5 Sheets-Sheet 4 BY 1 v,

.ATTORNEY March 20, 1945. N. A. JolflANsoN 2,372,000 ATTACHMENT FOR MILLING MACHINES AND THE LIKE 5 Sheets-Sheet 5 Filed Maren 18, 19421 ""d---u--L A TToR/yE Y vlatente'd Mar. 20, `.[945

' ATTACHMENT Fon MILLING MACHINES.

AND THELIKE fi .Nils A. Jqhason, Clifton, N. J. Application March 18, 1944, Serial No. 527,048

. s Claims. (Cl. 82-1.)

The invention relates to milling machines and `the like, vand has for its object to provide a novel attachment capable of being readily combined with the machine and designed to increasethe operative sphere of the latter.

The invention contemplates further the provision of a novel attachment for turning, facing and boring, arranged for easy and eflcient combination with the milling machine orthe like, to become an operative part thereof.

Another object of the invention is to provide a simple attachment which may be readily com bined with a milling machine or the llike to perform operations therein, heretofore, requiring velaborate and complicated equipment set up in a lathe.

Other objects will appear from the description hereinafter and the features of novelty will be pointed out in the claims.

In the accompanying drawings, which illusl` Ytrate examples of the invention without defining its limits, y

Fig. 1 is a side elevation .of the novel attach- -ment mounted in operative position in the milling machine or the like;

Fig. 2 is a front elevation of the attachment; Fig. 3 is a rear elevationy of the attachment on a larger scale and partly in section;` Fig. 4 is a longitudinal section on the of Fig. 3;

Fig. 5 is a detail sectional view of a clutch mechanism included in the attachment;

Fig. 6 is a horizontal sectional View on the line 8 6 of Fig.4;

Fig. '1 `is a detail the compound feed screw and associated parts;

Fig. 8 is an inverted plan view of the female member of a clutch included inthe attachment;

Fig. 9 is a detail view of the upper end ofthe feed screw shown in Fig. '1 and looking at right angles thereto;

' Fig. 10 is a perspective view of a bracket formingpart of the attachment;

y Fig. 11 is a side elevation of anotherl formfof,Y

the attachment, and

Fig. 12 is a rear view thereof.

The novelattachment inthe form illustrated in Figs. 1 to 10 inclusive .comprises a'bracketl5 having its upper end split at I3 and provided withan opening l1, and a bolt 1 8 and nut I8.-a

ywhereby said bracket I5 may beclampedin place in the milling machine or the like, `aswill more fully appear hereinafter. The lower.` depending portion. I9 of the bracket I5 is provided with a "circular opening 20, internally threaded for the line. 4,.-.4

elevation partly in section of.

accommodation ofthe externally-threaded sec-v tion 2l ofatubular member or rpedestal 22. 'I he latter is provided with an annular bearing sectionk 23 anda contiguous annular bearing section 24 of slightly larger diameter forming an annular shoulder ,25, and further includes an annular lflangel as shown in Figs. 1 and V5. An externallyethreaded clutch ring 21 is mounted on the annular bearing section 23 and is rigidly clamped thereon, between the annular Ashoulder 25. and the face of the depending portion I9 of the bracketf l5, and an internally-.threaded.clutch sleeve l2 8 is rotatably mounted on the clutch ring 21 inthreaded engagement therewith. The

threads of the ring 21 and sleeve 28 are of the quick-acting type to enable said sleeve 28 to `function. as .a feed clutch in the manner to be more fully set forth hereinafter. Any suitable `means ,may be provided .to facilitate the opera' tion oflthe clutch sleeve 28, as for instance by providing thevsame with an outwardlyeprojecting handle'23 Awhich may be detachably threaded into said sleeve 28. An annular feed clutch gear 30 is mountedon the bearingsection 24 and is located between vthe clutch sleeve 28 and the annular flange 26 of themember or pedestal 22 as shown i'n-.Fig 1'.A Dependent upon thev position of the clutch sleeve 23, the feed clutch gear 30 is either xed `against rotation on the bearing vsection 24 or is freeto rotate thereon. To facilitate the .lockingof the gear 30 by-'theolutch sleeve 28,

the latter preferably ispprovided on its one `face with an annular rib 28-a arranged to frictionally fit into an annular groove 30-.-a formed in the contiguous face ofthe gear 30 vas shown in Fig. 5. To improve the action of the clutch mechanism the rib 28-a and groove 30-a may be beveled in complemental relation to each other.

.The attachment further includesa. compound, `comprising a block 3| provided on one vface with an annular shoulderl 32fromwhich a preferably vtapering stem 32-a projects inv perpendicular relation preferably ras an integral part of the block 3|. Y. On its oppositeface the block Silisprovided with a guide rib 33'w1'iich extends Vthrougl'ioutthe length. thereof and is suitably formed along its opposite longitudinal edges kin a manner to constituteagllde for` the sliding movements of an associated slide 34.l In the illustrated example the guiderib33 is formed withundercutbevelled longitudinal Aedge surfaces` 35 for this purpose,

and ythe slidev 34-is provided `with co-,operating undercut bevelled ribs 36 Aextending 4lengtl'iwise thereof and-arranged to slidablyt said edge surfaces 35 to thereby slidably mount the slide 34 on the block 3| for the purpose to forth hereinafter.

As shown in Figs. 3 and 4, the block 3| includes a recess 3l, the opposite end walls of which are provided with threaded openingsfor the reception of threaded bearing bushings 38. A Acompound feed-screw 39 is rotatably mounted in said bushings 38 and at one end projects outwardly beyond the block 3| and is screw-threaded for the accommod'atio'n o'fa. nut-dwhere'by said' feed screw 39 is fixed 'against relative lengthwise movement without interfering with its rotation relatively to said block 3|. The opposite end of the feed'- screw 39 extends beyond the oppositeV end walll be more fully set of the recess 31 into an end chamber 4|' open` outwardly at the contiguous end of the block 3| as illustrated in Fig. 4. .At said opposite'end thev 4iced-screw 39 is provided with one member-.oa

clutch, as for instance the female clutch member 42 which comprises an annular sleeve 43 rotatably fitting the open end of the chamber 4|v anda preferably knurled or otherwise roughened inte.- gral` annular head 44 located. outwardly beyond the end of the block 3| as shown in Figs. 12, 3

.and 4. The clutch member 42. is keyed uponthe feed-screw 39`in any suitable-manneras by means of projections42--a or a conventional key ortlie like carried' by the` feed-screw 3.9 andextending into a. groove 45 extending lengthwise .interiorly of'the'clutch member 42. For the purpose ofl'xing the clutch. member 42 in different positions on the feed-screw 39, the lattermay be provided with a plurality ofindentations 46 designed to receive the inner Vend of a setscrew 4.1 carried by the clutch member 42`as shown in'Fig. 7.

The clutch member 42 is suitably designedfor cooperation with an associate male clutch member 48, and for this purpose may have theinner end portion ofthe sleeve 43 provided-interiorly witha pluralityof open-ended recesses 49' as illustrated in Fig. '7. The associate male clutch member. 48'is loosely mounted'on the feed-screw. 39 within the chamber 4| and. at its inner end carries aV worm gear 59, which preferably constitutesr an' integral `part of the male clutch member 4B' and in any,

case: rests rotatably upon. the one bearing bushing 38 as shown in 4. The male clutch member y48 in' addition includes a plurality of teeth 5| .or

. thereof carries a pinion 55 which may be ixed.y

to rotate with said'y shaft 53 in any convenient manner as by means of a set screw 56.

To enable the feed-screw 39 to be manually operated at will, an operating handle 39-a may be' provided as' shown in Figs. 1 and 2, and re- 39 and coupled thereto in 'any conventional manner as by means of pins 39-b on the feed-screw 39 and cooperating recesses on the. handle 39-a into 'which said pins 39b are arranged'. to fit.

-In the operative assembled condition of the compound the slide 34 is slidably mounted upon the guide rib 33 ofthe block 3| as illustrated in Fig. 6.. In the preferred arrangement a metal' or other *strip 51 is located between the. one edge surface 35 of the rib 33 and the contiguous surface of one rib 36 of the slide 34. For the purpose of adjusting the strip l to take up wear and to adjust the braking effect thereof, the block 3| may be provided with a plurality of set screws 5B bearing against said strip 51 and fixed in adjusted positions by lock-nuts 59. In order to slidably operate th-e slide 34, the latter is provided on its inner surface with an internally-threaded block or nut lillv secured in place by screws 6| or the like, and in'threaded engagement with-the interr mediate threaded portion 62 of the feed-screw 39 ample the aforesaid means comprises a tool- 65 movably fitted upon the end of said feed-screw A chine-,as set forthA above. .tachmenty in the. form' of. a complete unit, is

holder having a base-plate 63 and a tool-socket |54` located thereon in perpendicular relation as shown. inFigs, l, 4 and 6. The tool-socket 64 is designed@ to. receive and. hold the. selected, tool .65 whichimay be removably secured in place. in any suitablemanner. as by means of. one ormoreset screws 68.

Suitable means is provided for movably mounting. the tool-holder in vany oneof a pluralityof .positionsion the outer face of the slide 34.` I-ri-.the

illustrated. example the base-plate 63 accordingly is provided with, a plurality of openings'l arranged inco-operating pair-sin spaced parallel rows and` adapted. to register withthreaded aperturesihli located incorresponding pairs-in corresponding spaced. parallel. rows on. the front face of the slide` 34. .Screws E9 designed to pass through the openings 6l and into threaded engagementwith the aperturesBS. serve. to movably secure thev base-plate. 63 in surface engagement with the face of the slide 34K and thereby mount the. tool-holder in. positionl thereon.

To. mountthe attachment in the milling machine or the like, the bracket |5 may be clamped upon a rod 'Hl located at the upper end' of the pedestal or column. of the. millingmachine or the like, so as to depend. thereon in surface engagement `with y.said pedestalA .or column 'H as shown in. Fig. l. The feed-clutch and. associate elements which` may `be combined with .the vbracket l5I either priorto. or subsequently to its mounting in the milling machine or the like, are thereby suspended in saidmachine. at a distance above the. conventional reciprocating table thereof.'

'Ihe compound may then be placedin. posi-' .22. into. frictional. or other connection with the conventionaldriving spindle A. of the millingmachine as shown .inFig Land fitting the annular shoulder 32. into said tubular pedestal 22` which said shoulder fits snugly. At; ther same time the pinion 55 is brought intomesh with the feedclutch gear 39, as shown. in. Fig.. l, tovthereby mount the.` selected tool. 6.5.A in operative Vposition in the machine ready for predetermined. service therein.

Instead of. following. the vabove procedure. in combining the. attachment. with `the milling machine.. all parts of. saidattachment may be assembledand mounted on thebracket |.5., andthe latter thenclamped in. place in the milling ma- When. the whole atmount'edin the milling machine, the stem 32,-a is. connected with theV conventional. driving spining spindle A of said machine.'

the slide 34 and upon 32-a correspondingly rotates the compound comprising the block- 3l, slide 34 Yand associate elements, and causes the tool 55 tol develop operative functions dependentupon its position-on the setting of lthe clutch sleeve 28.

If the latter occupies-its left hand position in Figs. 1 and 5, in which the annular rib l2li-a kof the sleeve 281sv disengaged from the annular groove Sli-a, the feed clutch gear 30 will be free to rotate on the bearing section 24. Under such conditions the pinion 55 being in mesh with the gear 3th will simply cause the latter to rotate on vvbearing section 24 without bringing about any rotation of the pinion55 on its own axis. As a result the worm shaft 53, and worm .pinion 52 ralso do .notrotate about their common. axis and no rotative operation of theworm gear 50 on its .own axis takes place, with the result that the feed-screw 39'also remains stationary, insofaras relative rotative movement on its own axis is con cerned. .The slide 34 consequently does not move relatively to the block 3| and the tool 65 re.-

vmains ina given position onA the compound and performs its functions accordingly. 1

If the operation being performed by the tool B5 requires it. the feed-screw 39 may be relativelyrotatedon its'axis'in the following manner. A downward pressure on the handle 29 rotates the clutch sleeve 2li-on the relatively stationary clutch ring 21 which, Athrough the cooperation ofthe screwthreads of said ring 21 andv sleeve 28 shifts the-latter to the right to the posii tion shown in Fig. 5andforces the annular rib 2S-a into the annular groove 3ft-c in frictional engagement therewith; As a result the feed clutch gear 30 is lookedagainst relative rotativemovement on the bearing section 24.

Under such conditions. as the compound is rotated as previously described by the operation of the driving spindle A and stem 32`-a, the pinion 55 isv caused torollupcn and travel circumferentially of the stationary gear 30.

3U is caused to rotate on its own axis and ythereby v.correspondingly rotates the worm-shaft 53, and -wor-m pinion 52 and thereby rotatively actuates -theworm gear 50.

If, at the time the clutch members 42 and 48 are in engagement with each other, as shown in Fig. 7, the loperation ofthe worm gear will actuate the feed screw 39 Vand thereby cause the nut 3l! and with it the slide ..34 and associated tool-carrying means to be Aslidably shifted on the block 3L The tool `E55 will thereby be radially shifted coincidentally with its operation in circular paths.

As this takes place, the pinion in its travel about the gear Lannular.: head 44, Vwhich .further serves tolman'.- ually shift the female clutch m'ember 42.irito and out of l engagement 'l with the male clutch member v48.` at will.; .Thef` rotationnof.= the feed-screw V3S andthe consequent radial operation of the slide 34cand1. tool .65r may accordingly ,bef correspondingly controlled at Will. I l

S In the formshown in Figs. 11'and12.the novel attachment includes. means whereby theopera- .tionr of the feed-screw 39 may be controlled as to y'direction' of 'feed .and whereby. different feed speeds may beprovided. Y. l l `The attachment'in thisform generally speaking'may'be constructed' and arranged in the "sameiwayas the one first describedand.inc1udes the feedis'crew 39 and Worm gear50 which-as in the rst form meshes with the'worm pinion 52 on the worm-shaft 53. YThe latter, asinthe formfl'rst describedl carries a pinion 55"located vexteriorly ofthe block 3l; Theform of the 'attachment under discussion may v'also include all of. the other elements shown in theform vfirst described and operatingand functioning `in the samewayf.` l .y r n :The feed clutch gear 43l) instead ofmeshing directly with'the pinion 55 as in the,l rst form, is'in 'mesh With-a `gear '12 Vmounted on the block 3| preferably in.4 afslot 13 so1as to be capable of being' set-.in various positions thereon for the purpose to' bem'ore fully described hereinafter. The gear-121 meshes with algear 14 mounted on `the vblock'3l` and 4compounded with a pinion 15 'carriedV byl the 'samelsha'ft vwhich carries.` the 'gearl'll v H Y' 'i C AAreverse lever 16 is mounted on the block-3l torpivotally swing-about the common axis ofthe gear 14 and/.pinion 15 and preferably terminates in a handle 11 to facilitate its pivotal operation.

The-lever v15 carries a gear 1.8 which meshes'with thelpinion'i15 and'with-a gearr v19 also mounted onfsaid l:lever 16. The gearsr 18 and '19 are ar- .ranged 'to be selectively caused to mesh with the pinion- 55 by manipulating `the reverse `lever 16 to thereby determine the direction of rotation of the' feed'screw .39. Thevlever 'lli` is provided with an arcuate slot for.` the accommodation of .a threaded stem 8|. 'carriedrby the block 3| and adapted torece'ive'a nut '82- whereby thev re- Fig." 12 the gear 19' :is vdisconnected fromI the yco When the maleclut'ch member 48 is disengaged from the female member 42, which may `bedone by shifting the latter manually on the feedscrew 39, the latter will notbe rotated on pinion 55 and the gear 18 is in mesh therewith to thereby operate the feed screw 39 -in one: di- .rection Bypivotally. shifting the lever 16 downwardly from theposition shown in Fig. 12, r the 'gear 18 will be disconnected lfrom thefpin'ion `55, and the'gear 19 will beadjusted into mesh there- Lwith. This causes the train-of gearing tooperate the .feed screw 39 inthe opposite direction.

That isv to say. with `the' gear- 34 locked against rotation as hereinbeforesetiforthandthe compoundbeing rotatedy by the-operationof the driving spindle1;A.fand`stem 32e-a, theitra'inbf gearing and vlever .'l .will beoperated in a circular path,` withthe .gear11.2 travelling #circumferentia'lly` of and in meshed rolling engagement with the gear 30. .Thegear12'will therebybe'rotated on itsownaxis and bytransmissionthrough the gear 14; pinionV 15;. and gearz18xwill actuatethe lpinion 55 to operate thevfeed-screw 39 in'said one clirecton.` f i' latterimay be manually operate'dby meals off the i worm shaft, a train of gearing connected withv said pinion and including a gear meshing with and circumferentially rolling upon said clutch gear when locked against movement to thereby operate said feed screw, and otherwise rotating said clutch gear without operation of said feed screw, means for selectively adjusting said train of gearing to reverse the direction of rotation of said feed screw, tool-carrying means on said block in operative connection with said feed screw, and a tool removably mounted on said tool-carrying means for operation thereby.

5. An attachment for milling machines and the like comprising a bracket adapted to be removably mounted in the machine, a feed-clutch gear rotatably mounted on said bracket, means for selectively locking said feed-clutch gear against rotating, a compound movably carried by said bracket for connection with the driving means of said machine, a feed-screw carried by said com` pound, tool-carrying means movably mounted on said compound in operative connection with said feed-screw, a tool removably carried by said toolcarrying means, a pinion on said compound operatively connected with said feedfscrew, a main gear .on vsaid compound meshing withV said feedclutch gear and operated thereby when vvsaid clutch gear is locked against operation, a train of gearingy connecting said main gear with said' bracket for connection with the driving of said machine, a feed-screw carried by said compound, tool-carrying means movably mounted on said compound in operative connection'with said feedscrew, a tool removably carried by said tool-carryconnected with said vfeed-screw, a main gear on said compound meshing with said feed-clutch gear and operated thereby when said clutch gear is locked against operation, a train of gearing connecting said main gear with said pinion, and a lever pivotally mounted on said compound and carrying said train oi gearing for selectively ad justing the latter to reverse the direction of operation of said feed screw.

' NILS A. JOHANSON` 

